:root{
  --ink:#261717;
  --bg:#160c0c;
  --red:#ff0000;
  --pink:#ff1493;
  --text:#f8eded;
  --muted:#c9aeae;
  --line:rgba(255,255,255,.16);
  --surface:rgba(255,255,255,.05);
  --rail:308px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Work Sans","Outfit",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{
  font-family:"Outfit","Work Sans","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:600;
  letter-spacing:-.02em;
}

a{color:inherit}

:focus-visible{
  outline:2px solid var(--pink);
  outline-offset:3px;
  border-radius:4px;
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* 极光背景 */
.aurora{
  position:fixed;
  inset:0;
  z-index:0;
  overflow:hidden;
  pointer-events:none;
  background:
    radial-gradient(120% 90% at 82% -12%, #401515 0%, transparent 62%),
    radial-gradient(100% 80% at -5% 105%, #2d1017 0%, transparent 58%),
    #160c0c;
}

.aurora i{
  position:absolute;
  width:68vmax;height:68vmax;
  border-radius:50%;
  opacity:.46;
  filter:blur(80px) saturate(1.25);
  mix-blend-mode:screen;
  background:radial-gradient(circle at 35% 35%, var(--pink), transparent 62%);
  animation:drift 11s ease-in-out infinite alternate;
}

.aurora i:nth-child(1){
  top:-26vmax;left:-12vmax;
  background:radial-gradient(circle at 40% 40%, var(--red), transparent 60%);
  animation-duration:10s;
}

.aurora i:nth-child(2){
  bottom:-32vmax;right:-16vmax;
  animation-duration:13s;
  animation-delay:-4s;
}

.aurora i:nth-child(3){
  top:18vmax;right:8vmax;
  width:44vmax;height:44vmax;
  opacity:.3;
  animation-duration:9s;
  animation-delay:-2s;
  background:conic-gradient(from 40deg, var(--red), var(--pink), transparent 68%);
}

@keyframes drift{
  0%{transform:translate3d(0,0,0) scale(1)}
  100%{transform:translate3d(5vmax,-4vmax,0) scale(1.16)}
}

/* 骨架 */
.shell{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  min-height:100vh;
}

.col{
  display:flex;
  flex-direction:column;
  min-width:0;
}

/* 左侧竖栏 */
.rail{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  flex-direction:row;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:10px 14px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, rgba(22,12,12,.96), rgba(22,12,12,.86));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:4px 0;
  text-decoration:none;
  color:var(--text);
  font-family:"Outfit",sans-serif;
  font-size:1.12rem;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}

.brand-mark{
  width:32px;height:32px;
  border-radius:9px;
  object-fit:cover;
  border:1px solid var(--line);
}

/* 导航：详情折叠 + 药丸 */
.nav{position:relative;flex:0 0 auto}

.nav summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:44px;
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  cursor:pointer;
  list-style:none;
  font-size:.95rem;
  letter-spacing:.08em;
  color:var(--muted);
  background:rgba(255,255,255,.04);
  transition:color .25s ease,border-color .25s ease;
}

.nav summary::-webkit-details-marker{display:none}

.nav summary::after{
  content:"";
  width:9px;height:9px;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .25s ease;
}

.nav[open] summary{color:var(--text);border-color:var(--pink)}

.nav[open] summary::after{transform:rotate(-135deg) translateY(-2px)}

.nav menu{
  margin:10px 0 0;
  padding:0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:8px;
}

@media(max-width:1023px){
  .nav menu{
    position:absolute;
    left:0;right:0;
    top:calc(100% + 8px);
    padding:10px;
    border:1px solid var(--line);
    border-radius:14px;
    background:#1e1111;
    box-shadow:0 20px 44px rgba(0,0,0,.55);
    max-height:72vh;
    overflow:auto;
  }
}

.nav menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  text-decoration:none;
  font-size:.97rem;
  color:var(--text);
  background:linear-gradient(120deg, rgba(255,0,0,.07), rgba(255,20,147,.11));
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}

.nav menu a:hover,
.nav menu a:focus-visible{
  transform:translateX(3px);
  border-color:var(--pink);
  background:linear-gradient(120deg, rgba(255,0,0,.24), rgba(255,20,147,.32));
}

/* 侧栏卡片 */
.rail-side{display:none;flex-direction:column;gap:14px}

.side-card{
  border:1px solid var(--line);
  border-radius:10px;
  padding:14px 12px;
  background:rgba(38,23,23,.42);
}

.side-card h2{
  margin:0 0 10px;
  font-size:.76rem;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--muted);
}

.side-card h2 span{
  display:inline-block;
  padding-bottom:2px;
  border-bottom:1px solid rgba(255,20,147,.45);
}

.side-list{
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:side;
}

.side-list li{counter-increment:side}

.side-list a{
  display:flex;
  gap:10px;
  align-items:baseline;
  min-height:40px;
  padding:7px 2px;
  font-size:.9rem;
  text-decoration:none;
  color:var(--muted);
  border-bottom:1px dashed rgba(255,255,255,.08);
  transition:color .2s ease;
}

.side-list li:last-child a{border-bottom:0}

.side-list a::before{
  content:counter(side,decimal-leading-zero);
  font-family:"Outfit",sans-serif;
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--pink);
}

.side-list a:hover,
.side-list a:focus-visible{color:#fff}

/* Hero */
.hero{
  position:relative;
  display:grid;
  place-items:center;
  min-height:76vh;
  padding:64px 20px;
  text-align:center;
  isolation:isolate;
  overflow:hidden;
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background-image:
    linear-gradient(rgba(255,255,255,.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.075) 1px, transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(72% 68% at 50% 45%, #000 0%, transparent 100%);
  mask-image:radial-gradient(72% 68% at 50% 45%, #000 0%, transparent 100%);
}

.hero-inner{max-width:15ch}

.hero h1{
  margin:0;
  font-size:clamp(2.6rem, 8.4vw, 6.4rem);
  line-height:1.03;
  letter-spacing:-.038em;
  font-weight:700;
  background:linear-gradient(118deg, #fff 8%, var(--pink) 52%, var(--red) 96%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 34px rgba(255,20,147,.3));
}

.lede{
  max-width:34rem;
  margin:22px auto 0;
  color:var(--muted);
  font-size:1.03rem;
}

.cue{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  margin-top:30px;
  padding:11px 30px;
  border:1px solid var(--line);
  border-radius:999px;
  text-decoration:none;
  font-size:.96rem;
  letter-spacing:.12em;
  color:var(--text);
  background:rgba(255,255,255,.05);
  transition:border-color .25s ease,background .25s ease,box-shadow .25s ease;
}

.cue:hover,
.cue:focus-visible{
  border-color:var(--pink);
  background:linear-gradient(120deg, rgba(255,0,0,.28), rgba(255,20,147,.34));
  box-shadow:0 0 26px rgba(255,20,147,.35);
}

/* 正文 */
main{
  flex:1 1 auto;
  padding:0 18px 8px;
}

div{
  max-width:760px;
  margin:0 auto;
  padding:6px 0 48px;
}

div section{
  padding:36px 0;
  border-top:1px solid var(--line);
  scroll-margin-top:96px;
}

div section:first-child{border-top:0;padding-top:12px}

div h2{
  margin:0 0 .62em;
  font-size:clamp(1.45rem, 3.4vw, 1.95rem);
  line-height:1.28;
}

div h2 span,
div h3 span{
  background:linear-gradient(92deg, var(--pink), var(--red));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

div h3{
  margin:1.6em 0 .5em;
  font-size:1.16rem;
  line-height:1.4;
}

div p{margin:0 0 1.05em}

div ul,
div ol{
  margin:0 0 1.1em;
  padding-left:1.3em;
}

div li{margin:.4em 0}

div a{
  color:#ffa9d3;
  text-decoration:underline;
  text-decoration-color:rgba(255,20,147,.5);
  text-underline-offset:3px;
}

div a:hover{color:#fff}

div strong{color:#fff;font-weight:600}

div blockquote{
  margin:1.2em 0;
  padding:12px 16px;
  border-left:2px solid var(--pink);
  border-radius:0 10px 10px 0;
  background:rgba(255,20,147,.08);
  color:#f0d9d9;
}

div img{
  max-width:100%;
  height:auto;
  border-radius:10px;
  border:1px solid var(--line);
}

/* 页脚 */
.foot{
  margin-top:26px;
  padding:42px 18px 22px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,20,147,.06), rgba(38,23,23,.6));
}

.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:26px;
  max-width:980px;
  margin:0 auto;
}

.foot h3{
  margin:0 0 12px;
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--muted);
}

.foot h3 span{
  display:inline-block;
  padding-bottom:3px;
  border-bottom:1px solid rgba(255,20,147,.5);
}

.foot address{
  font-style:normal;
  line-height:1.85;
  color:var(--muted);
  font-size:.95rem;
}

.foot address strong{
  display:block;
  color:var(--text);
  font-family:"Outfit",sans-serif;
  font-size:1.02rem;
  font-weight:600;
}

.foot address span{display:block;word-break:break-all}

.foot-list{
  margin:0;
  padding:0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
}

.foot-list a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  text-decoration:none;
  font-size:.95rem;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}

.foot-list a:hover,
.foot-list a:focus-visible{color:#fff;border-bottom-color:var(--pink)}

.sub{display:flex;flex-wrap:wrap;gap:8px}

.sub input{
  flex:1 1 150px;
  min-height:44px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  background:rgba(255,255,255,.06);
  color:var(--text);
  font:inherit;
  font-size:16px;
}

.sub input::placeholder{color:#a98f8f}

.sub button{
  min-height:44px;
  padding:10px 22px;
  border:0;
  border-radius:999px;
  font:inherit;
  font-size:.95rem;
  font-weight:600;
  color:#1a0b0b;
  background:linear-gradient(120deg, var(--red), var(--pink));
  cursor:pointer;
  transition:filter .22s ease,transform .22s ease;
}

.sub button:hover,
.sub button:focus-visible{filter:brightness(1.12);transform:translateY(-1px)}

.copy{
  max-width:980px;
  margin:34px auto 0;
  padding-top:16px;
  border-top:1px solid rgba(255,255,255,.08);
  text-align:center;
  font-size:.86rem;
  color:#a98f8f;
}

/* 动效 */
.rv{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s ease,transform .7s ease;
}

.rv.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .aurora i{animation:none}
  .rv{opacity:1;transform:none;transition:none}
  .nav menu a:hover,.sub button:hover{transform:none}
}

/* 断点 */
@media(min-width:720px){
  .foot-grid{grid-template-columns:1.1fr 1fr 1.2fr}
  .foot{padding:48px 26px 22px}
  main{padding:0 26px 8px}
}

@media(min-width:1024px){
  .shell{grid-template-columns:var(--rail) minmax(0,1fr)}

  .rail{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:24px;
    height:100vh;
    padding:30px 22px;
    border-bottom:0;
    border-right:1px solid var(--line);
    overflow:auto;
    scrollbar-width:thin;
  }

  .rail-side{display:flex}

  .hero{min-height:100vh;padding:80px 32px}

  main{padding:0 32px 8px}
}

button[aria-expanded]{min-width:44px;min-height:44px}